Safety tread



May 22, 1928. 1,670,798

D. s. CONNELLY SAFETY TREAD Filed May 12, 1927 D. J Gonna/(y 9M x/ Patented May 22, 1928.

UNITED STA Donna) s. coimnmx, or oan'ron', OHIO,

COMPANY, or woos'rnn, 0210,

Application file My invention relatesto saf ing treads for use in stair-ways ike for preventing persons using ways from slipping rss 1,670,798 PATENT OFFICE.

ASSIGNOB TO THE SAFETY STAIR TBEAD A CORPORATION OF OHIO.

- SAFETY BREAD.

ety or non-slipan the the stalrand for providing a durable stair tread which will stand heavy use e.

lore particularly myinvention relates to treads .which have a to wearing surface made u entirely of a s'ultable non-slipping materia or composition, and

is carried by a tread base p suitable front edge The objects 0 my provide a safety tread acter and description, be formed by rolling mill provided with suitable and for securing and material thereon,

of the which matemal rovided with a or nosing.

improvements are to foregoing char and whose base may operations and efiicient means binding the non-slipping and which is refera bly formed integral with a suitable ronted a or nosing, and when desired rear flange.

with a suitab e Further objects of my improvement include the provision of non-sli ing material the 100 mg pin easi

material wears away, y replaced without a means. 11 other types of an upper entirely imbedding means and securing the same to the base, wherebywhen the upper non-slipthe same may mage to the locklayer of safety treads including metallic locking members extending mto the wearing surface, these metallic members are worn away together with slipping-material is e foregoing obj ects structions and arran ements scribed in deta1l,- an which whatever nonused therewith.

are attained by conhereinafter de- P may be stated in general terms as including a preferabl metallic base which may be strong enough to constitute a stair step and which is provided with' longitudinally wardly protruding adapted to lock into non-slip ing material placed stitute t tread. v

- For attaining economy and strength and rigidity base and ribs are preferably with a suitable front nosing,

extending updove+tailed key ri a and secure a suitablethereon to'eone upper wearing surface'for the of manufacture; in: the tread, the

rolled integral sired with a suitable rear flange.

Preferred embodiments of my improvements are illustrated in the aecom ymg drawing forming part hereo f, in w ich 'erally at 110 in Fig. 2,

a stair step, or may 'a built-in step 130, of concrete or the like. i I

and when de-- a. min, 1927. Serial No. 19am.

Fi ure 1 is a fragmentary g oblique perspectlve view illustrating one embodiment of my'improved safety tread; and Fig. 2-, a similar view illustrating a modified embodiment thereof. Similar numerals refer to throughout the drawing. 4

The safety tread embodying my invention and indicated generally at 10 in Fig. 1, includes a preferably rolled metal base 11 which preferably has sufiicient thickness so that it may constitute a stair step and be associated in a usual manner with risers 12 and 13, and carried as may be desired by similar parts end or intermediate supports not shown.

The base 11 is provided on its upper face with spaced longitudinally extending upwardly protruding dove-tailed key ribs 14 adapted/to rigidly lock into and secure-any suitable non-slipping material 15 placed thereon and preferably entirely imbedding the ribs so that an ripper wearing surface 16 is provided for the tread consisting entirely of non-slipping material.

Prefera y rolled integral with the base, a front nosing 17 may be provided for the tread, and the nosing preferably includes a be fiangeIS extending upwardly and having an upper face 19 preferably at the level of the upper wearing surface 16 of the tread.

A rear flange. 20 may likewise be provided and may extend upwardly so that its upper face 21 is at the level of the upper wearing surface.

The front nosing and the rear flange thus 7 form a trough for receiving the non-sliping material 15 imbedding and looking with the ribs 14.

While it is preferred. to roll the'bases forflanges so that an upper wearing surface 116 is provided for the tread consisting entirely of non-slipping material. v

Preferably rolled integral with the base, a frontnosing 117 may be provided for the tread, and the nosing preferably includes a flange 118 extending upwardly and having an upper face 119 preferably at the level of the upper wearing surface 116 of the tread.

I claim: 1. In safety treadsand the like, a base, laterally spaced longitudinally extending key ribs outwardly protruding from one face of 3. In safety treads and the like, a base,- laterally spaced longitudinally extending key ribs outwardly protruding from one face of the base, laterally protruding flanges on the outer ends of the ribs, and non-slipping material entirely imbedding and locked by the key ribs and constituting the facefor the tread. I

4. In safety treads and the like, a base, laterally spaced longitudinally extending key ribs outwardly protruding from one face of the base,"a nosing at one side edge of the base including a flange extending outwardly in the same direction as the ribs, and a flange at another side edge of the base oppositethe nosing and extending outwardlyin the same direction as the ribs and nosing, and non-slipping material entirely imbedding and locked by the key ribs and constituting the wearing surface for the tread.

5; In safety treads and the like, a base, laterally spaced longitudinally extending key ribs outwardly protruding from one face of the base, a nosing at one side edge of the base including a flange extending outwardly in the same direction as the, ribs, and a flange wearing surat another side edge of the base opposite the nosing and extending outwardly in the same dlrectlon 'as the ribs and nosing, and the outer ends. of the flanges.extending further from the base than the outer ends of the ribs.

In testimony that I claim the above, I have hereunto subscribed my name. 7

- v DONALD S. 'CONNELLY. 

